/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef SRC_SQL_ENGINE_EXPR_OB_EXPR_DAY_OF_FUNC_H_
#define SRC_SQL_ENGINE_EXPR_OB_EXPR_DAY_OF_FUNC_H_
#include "sql/engine/expr/ob_expr_operator.h"
#include "sql/engine/expr/ob_expr_time.h"

namespace oceanbase {
namespace sql {

class ObExprDayOfMonth : public ObExprTimeBase {
public:
  ObExprDayOfMonth();
  explicit ObExprDayOfMonth(common::ObIAllocator& alloc);
  virtual ~ObExprDayOfMonth();
  static int calc_dayofmonth(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprDayOfMonth);
};

class ObExprDay: public ObExprTimeBase {
public:
  ObExprDay();
  explicit ObExprDay(common::ObIAllocator &alloc);
  virtual ~ObExprDay();
private:
  DISALLOW_COPY_AND_ASSIGN(ObExprDay);
};

class ObExprDayOfWeek : public ObExprTimeBase {
public:
  ObExprDayOfWeek();
  explicit ObExprDayOfWeek(common::ObIAllocator& alloc);
  virtual ~ObExprDayOfWeek();
  static int calc_dayofweek(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprDayOfWeek);
};

class ObExprDayOfYear : public ObExprTimeBase {
public:
  ObExprDayOfYear();
  explicit ObExprDayOfYear(common::ObIAllocator& alloc);
  virtual ~ObExprDayOfYear();
  static int calc_dayofyear(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprDayOfYear);
};

class ObExprToSeconds : public ObFuncExprOperator {
public:
  ObExprToSeconds();
  explicit ObExprToSeconds(common::ObIAllocator& alloc);
  virtual ~ObExprToSeconds();
  virtual int calc_result_type1(
      ObExprResType& type, ObExprResType& date, common::ObExprTypeCtx& type_ctx) const override;
  virtual int calc_result1(
      common::ObObj& result, const common::ObObj& date, common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_toseconds(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprToSeconds);
};

inline int ObExprToSeconds::calc_result_type1(
    ObExprResType& type, ObExprResType& date, common::ObExprTypeCtx& type_ctx) const
{
  UNUSED(type_ctx);
  UNUSED(date);
  type.set_int();
  type.set_scale(common::DEFAULT_SCALE_FOR_INTEGER);
  type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
  if (ob_is_enumset_tc(date.get_type())) {
    date.set_calc_type(common::ObVarcharType);
  }
  return common::OB_SUCCESS;
}

class ObExprSecToTime : public ObFuncExprOperator {
public:
  ObExprSecToTime();
  explicit ObExprSecToTime(common::ObIAllocator& alloc);
  virtual ~ObExprSecToTime();
  virtual int calc_result_type1(
      ObExprResType& type, ObExprResType& date, common::ObExprTypeCtx& type_ctx) const override;
  virtual int calc_result1(
      common::ObObj& result, const common::ObObj& date, common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_sectotime(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprSecToTime);
};

inline int ObExprSecToTime::calc_result_type1(
    ObExprResType& type, ObExprResType& sec, common::ObExprTypeCtx& type_ctx) const
{
  type.set_time();
  type.set_scale((0 <= sec.get_scale() && sec.get_scale() <= 6) ? sec.get_scale() : common::MAX_SCALE_FOR_TEMPORAL);
  // set calc type
  sec.set_calc_type(common::ObNumberType);
  UNUSED(type_ctx);
  return common::OB_SUCCESS;
}

class ObExprTimeToSec : public ObFuncExprOperator {
public:
  ObExprTimeToSec();
  explicit ObExprTimeToSec(common::ObIAllocator& alloc);
  virtual ~ObExprTimeToSec();
  virtual int calc_result_type1(
      ObExprResType& type, ObExprResType& date, common::ObExprTypeCtx& type_ctx) const override;
  virtual int calc_result1(
      common::ObObj& result, const common::ObObj& date, common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_timetosec(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprTimeToSec);
};

inline int ObExprTimeToSec::calc_result_type1(
    ObExprResType& type, ObExprResType& time, common::ObExprTypeCtx& type_ctx) const
{
  UNUSED(type_ctx);
  type.set_int();
  type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
  type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
  type_ctx.set_cast_mode(type_ctx.get_cast_mode() | CM_NULL_ON_WARN);
  time.set_calc_type(common::ObTimeType);
  return common::OB_SUCCESS;
}

class ObExprSubtime : public ObFuncExprOperator {
public:
  explicit ObExprSubtime(common::ObIAllocator& alloc);
  virtual ~ObExprSubtime(){};
  virtual int calc_result_type2(ObExprResType& type, ObExprResType& date_arg, ObExprResType& time_arg,
      common::ObExprTypeCtx& type_ctx) const override;
  virtual int calc_result2(common::ObObj& result, const common::ObObj& date_arg, const common::ObObj& time_arg,
      common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int subtime_common(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum, bool& null_res,
      common::ObDatum*& date_arg, common::ObDatum*& time_arg, int64_t& time_val);
  static int subtime_datetime(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
  static int subtime_varchar(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprSubtime);
};

}  // namespace sql
}  // namespace oceanbase

#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_DAY_OF_FUNC_H_ */
